Topic

Selection bias

Distortion that arises when a model is trained or evaluated on data already filtered by an earlier decision, so the filter's own criteria leak into what the model learns.

Current clusters

science2 publishers

The 25% CTE figure rests on 338 donated brains out of 1,712 NFL deaths

The BMJ study's range runs from 24.5% to 97.7% because 1,374 of those brains were never examined. That width reflects who donates, not how common the disease is.

Publishers:livescience.comstatnews.com

Reality

Evidence60
Adoption: Insufficient
Hype gap+10
Incentives: Insufficient
Confidence60

build1 publisher

Sentinel trains its fraud model on alerted-vs-cleared cases to stop double-counting the alert itself

Sentinel's builder trained its alert model on fraud versus cleared cases, reaching 0.9465 AUC after three passes that over-called fraud on every case. The finished agent lets an LLM write the explanation and leaves every action to fixed bank rules.

Publishers:dev.to

Reality

Evidence35
Adoption5
Hype gap+10
Incentives55
Confidence40